<template>
    <view
      v-if="showPopup"
      class="uni-popup"
      :class="[popupstyle]"
      @touchmove.stop.prevent="clear"
    >
      <uni-transition
        v-if="maskShow"
        :mode-class="['fade']"
        :styles="maskClass"
        :duration="duration"
        :show="showTrans"
        @click="onTap"
      />
      <uni-transition
        :mode-class="ani"
        :styles="transClass"
        :duration="duration"
        :show="showTrans"
        @click="onTap"
      >
        <view
          class="uni-popup__wrapper-box"
          @click.stop="clear"
        >
          <slot />
        </view>
      </uni-transition>
    </view>
  </template>
  
  <script>
  import uniTransition from '../uni-transition/uni-transition.vue'
  import popup from './popup.js'
  /**
     * PopUp 弹出层
     * @description 弹出层组件，为了解决遮罩弹层的问题
     * @tutorial https://ext.dcloud.net.cn/plugin?id=329
     * @property {String} type = [top|center|bottom] 弹出方式
     *   @value top 顶部弹出
     *   @value center 中间弹出
     *   @value bottom 底部弹出
     *   @value message 消息提示
     *   @value dialog 对话框
     *   @value share 底部分享示例
     * @property {Boolean} animation = [ture|false] 是否开启动画
     * @property {Boolean} maskClick = [ture|false] 蒙版点击是否关闭弹窗
     * @event {Function} change 打开关闭弹窗触发，e={show: false}
     */
  
  export default {
    name: 'UniPopup',
    components: {
      uniTransition,
    },
    props: {
      // 开启动画
      animation: {
        type: Boolean,
        default: true,
      },
      // 弹出层类型，可选值，top: 顶部弹出层；bottom：底部弹出层；center：全屏弹出层
      // message: 消息提示 ; dialog : 对话框
      type: {
        type: String,
        default: 'center',
      },
      // maskClick
      maskClick: {
        type: Boolean,
        default: true,
      },
    },
    provide() {
      return {
        popup: this,
      }
    },
    mixins: [popup],
    watch: {
      /**
         * 监听type类型
         */
      type: {
        handler: function(newVal) {
          this[this.config[newVal]]()
        },
        immediate: true,
      },
      /**
         * 监听遮罩是否可点击
         * @param {Object} val
         */
      maskClick(val) {
        this.mkclick = val
      },
    },
    data() {
      return {
        duration: 300,
        ani: [],
        showPopup: false,
        showTrans: false,
        maskClass: {
          position: 'fixed',
          bottom: 0,
          top: 0,
          left: 0,
          right: 0,
          backgroundColor: 'rgba(0, 0, 0, 0.4)',
        },
        transClass: {
          position: 'fixed',
          left: 0,
          right: 0,
        },
        maskShow: true,
        mkclick: true,
        popupstyle: 'top',
      }
    },
    created() {
      this.mkclick = this.maskClick
      if (this.animation) {
        this.duration = 300
      } else {
        this.duration = 0
      }
    },
    methods: {
      clear(e) {
        // TODO nvue 取消冒泡
        e.stopPropagation()
      },
      open() {
        this.showPopup = true
        this.$nextTick(() => {
          new Promise(resolve => {
            clearTimeout(this.timer)
            this.timer = setTimeout(() => {
              this.showTrans = true
              // fixed by mehaotian 兼容 app 端
              this.$nextTick(() => {
                resolve()
              })
            }, 50)
          }).then(res => {
            // 自定义打开事件
            clearTimeout(this.msgtimer)
            this.msgtimer = setTimeout(() => {
              this.customOpen && this.customOpen()
            }, 100)
            this.$emit('change', {
              show: true,
              type: this.type,
            })
          })
        })
      },
      close(type) {
        this.showTrans = false
        this.$nextTick(() => {
          this.$emit('change', {
            show: false,
            type: this.type,
          })
          clearTimeout(this.timer)
          // 自定义关闭事件
          this.customOpen && this.customClose()
          this.timer = setTimeout(() => {
            this.showPopup = false
          }, 300)
        })
      },
      onTap() {
        if (!this.mkclick) return
        this.close()
      },
      /**
         * 顶部弹出样式处理
         */
      top() {
        this.popupstyle = 'top'
        this.ani = ['slide-top']
        this.transClass = {
          position: 'fixed',
          left: 0,
          right: 0,
        }
      },
      /**
         * 底部弹出样式处理
         */
      bottom() {
        this.popupstyle = 'bottom'
        this.ani = ['slide-bottom']
        this.transClass = {
          position: 'fixed',
          left: 0,
          right: 0,
          bottom: 0,
        }
      },
      /**
         * 中间弹出样式处理
         */
      center() {
        this.popupstyle = 'center'
        this.ani = ['zoom-out', 'fade']
        this.transClass = {
          position: 'fixed',
          /* #ifndef APP-NVUE */
          display: 'flex',
          flexDirection: 'column',
          /* #endif */
          bottom: 0,
          left: 0,
          right: 0,
          top: 0,
          justifyContent: 'center',
          alignItems: 'center',
        }
      },
    },
  }
  </script>
  <style lang="scss" scoped>
  .uni-popup {
    position: fixed;
    /* #ifndef APP-NVUE */
    z-index: 99;
    /* #endif */
  }
  
  .uni-popup__mask {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: $uni-bg-color-mask;
    opacity: 0;
  }
  
  .mask-ani {
    transition-property: opacity;
    transition-duration: 0.2s;
  }
  
  .uni-top-mask {
    opacity: 1;
  }
  
  .uni-bottom-mask {
    opacity: 1;
  }
  
  .uni-center-mask {
    opacity: 1;
  }
  
  .uni-popup__wrapper {
    /* #ifndef APP-NVUE */
    display: block;
    /* #endif */
    position: absolute;
  }
  
  .top {
    /* #ifdef H5 */
    top: var(--window-top);
    /* #endif */
    /* #ifndef H5 */
    top: 0;
    /* #endif */
  }
  
  .bottom {
    bottom: 0;
  }
  
  .uni-popup__wrapper-box {
    /* #ifndef APP-NVUE */
    display: block;
    /* #endif */
    position: relative;
    /* iphonex 等安全区设置，底部安全区适配 */
    /* #ifndef APP-NVUE */
    padding-bottom: constant(safe-area-inset-bottom);
    padding-bottom: env(safe-area-inset-bottom);
    /* #endif */
  }
  
  .content-ani {
    // transition: transform 0.3s;
    transition-property: transform, opacity;
    transition-duration: 0.2s;
  }
  
  .uni-top-content {
    transform: translateY(0);
  }
  
  .uni-bottom-content {
    transform: translateY(0);
  }
  
  .uni-center-content {
    transform: scale(1);
    opacity: 1;
  }
  </style>